android.support.v4.view.ViewPager#getContext ( )源码实例Demo

@BindingAdapter(value = {"fragments", "curIndex"}, requireAll = false)
public static void bind(ViewPager container, final List<? extends Fragment> fragments, int curIndex) {
    if(!(container.getContext() instanceof FragmentActivity))
        throw new IllegalArgumentException(TAG + "context must instanceof FragmentActivity");
    FragmentManager fm = ((FragmentActivity) container.getContext()).getSupportFragmentManager();

    if (fragments != null && !fragments.isEmpty()) {
        PagerAdapter adapter = container.getAdapter();
        if(adapter == null) {
            // initialize, fragments are only added once !!!
            container.setAdapter(adapter = new FragmentPagerAdapter(fm) {
                @Override
                public Fragment getItem(int position) {
                    return fragments.get(position);
                }

                @Override
                public int getCount() {
                    return fragments.size();
                }
            });
        }

        adapter.notifyDataSetChanged();

        if(curIndex >= 0 && curIndex < fragments.size())
            container.setCurrentItem(curIndex);
    }
}
 

private static void setDuration(ViewPager pager, int duration) {
    try {
        FixedSpeedScroller scroller = new FixedSpeedScroller(pager.getContext(), new AccelerateDecelerateInterpolator(), duration);
        Field field = ViewPager.class.getDeclaredField("mScroller");
        field.setAccessible(true);
        field.set(pager, scroller);
    } catch (Exception e) {
        e.printStackTrace();
    }
}
 

public ViewPageFragmentAdapter(FragmentManager fm,
		PagerSlidingTabStrip pageStrip, ViewPager pager) {
	super(fm);
	mContext = pager.getContext();
	mPagerStrip = pageStrip;
	mViewPager = pager;
	mViewPager.setAdapter(this);
	mPagerStrip.setViewPager(mViewPager);
}
 

public MorePagerAdapter(ViewPager viewPager, List<BaseAction> actions) {
    this.context = viewPager.getContext();
    this.viewPager = viewPager;
    this.actionList = actions;
    this.gridViewCount = (actions.size() + ITEM_COUNT_PER_GRID_VIEW - 1) / ITEM_COUNT_PER_GRID_VIEW;
}
 

public ActionsPagerAdapter(ViewPager viewPager, List<BaseAction> actions) {
    this.context = viewPager.getContext();
    this.actions = new ArrayList<>(actions);
    this.viewPager = viewPager;
    this.gridViewCount = (actions.size() + ITEM_COUNT_PER_GRID_VIEW - 1) / ITEM_COUNT_PER_GRID_VIEW;
}